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水銀ベースのコップレート,高過渡温度,穀物境界交差点,および110ケルビン以上で動作するSQUID
まとめ
HgBa ((2) CaCu ((2) O ((6+デルタ)) (Hg-1212) の高温超伝導膜は,優れた輸送特性を示しています. 製造された超伝導量子干渉装置 (SQUID) は111.8Kまで動作し,ポータブルセンサーアプリケーションを可能にします.
科学分野:
- マテリアルサイエンス 材料科学
- 凝縮物質物理学 凝縮物質物理学
- 超伝導性は超伝導性である.
背景:
- HgBa ((2) CaCu ((2) O ((6+デルタ)) (Hg-1212) は,高温カップレート超伝導体である.
- 超伝導体の粒子の境界は弱いリンクとして作用し,臨界電流密度に影響を与える可能性があります.
- 超伝導量子干渉装置 (SQUID) は,敏感な磁気流量検出器である.
研究 の 目的:
- HgBa(2)CaCu(2)O(6+デルタ) フィルムと粒子の境界の接点の超伝導輸送特性を調査する.
- これらの穀物境界の接点を使用してSQUIDを製造し,特徴づけます.
- これらのデバイスの実用的な応用の可能性を評価する.
主な方法:
- SrTiO(3) のバイクリスタル基板にHgBa(2)CaCu(2)O(6+デルタ) フィルムの生長.
- 臨界電流密度と零抵抗温度を測定する.
- 直流SQUIDの製造と試験.
主要な成果:
- HgBa ((2) CaCu ((2) O ((6+デルタ) フィルムは,約120 Kのゼロ抵抗温度と100 Kで高い臨界電流密度 (10^6 A/cm^2) を表しています.
- 粒子の境界は弱いリンクとして作用し,臨界電流を最大3桁まで減少させます.
- 製造されたSQUIDは111.8Kまで動作し,明確な磁場反応を示します.
結論:
- HgBa(2)CaCu(2)O(6+デルタ) の粒子の境界の接点は,SQUID製造に適した弱いリンクの振る舞いを表しています.
- HgBa ((2) CaCu ((2) O ((6+デルタ) の高い動作温度により,SQUIDは,従来型でない冷却を備えた携帯センサーやデバイスにとって有望である.
- さらなる研究により,これらのデバイスを最適化し,パフォーマンスを向上させ,より広範なアプリケーションを提供することができます.
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